Improvement in hot-air blowers



panni and,

B. F. STURTEVANT, or JAMAICA PLAIN, MASSACHUSETTS.

Lenerspaiem N 100,238, daad February 22, 1870.

IMPROVEMENT IN HOT-AIR BLOWBRS. t

dwp- 'The Schedule referred to in theseLetters Patent and making part of the same.

To all whom it may concern.-

-Be it known that I, B. F. STUnTnvAsT, of Jamaica Plain, in the county of Norfolk, and State ot' Massachusetts, have invented Imprim-ments in Blowers; and I do herebydeclare that the bllowing, taken in connection with the drawings which accompany and forni part of this specification, is a description of my invention sufcicnt to enable those skilled in the art to practice it.

This blower is designed to draw 'in at its lcenter and to force out ot'its outlet: hot air or gases, including the volatile products ofthe combustion of any mattei', and may be used in various situations for mechanical and chemical operations.

It is connnon in .blowei's to let theincnming current, which' is usually cold air, pass into`the blower in direct contact with the blower-shaft and the bearings therefor. But for sonie, at least, of the purposes for which iny improved blower may be utilized, the hot incoming current, it' coming into contact witlithe blower-shaft and its hearings, would bnrii the oil used to lubricate the rapidly-revolving shaft, and would, in some. cases, till the bearings with ashes land grit, which would cause the shaft to stick fast in its bearings so that it couldnot be rotated.

My invention consists in a peculiarity of construction by which I introduce heated aeriform fluids into the blower at a suticient distance t'roiii the shaft and its bcaiiugs to obviate danger of heating the Sallie; and

It consists further in such a construction as ena- 'bles me, at will, to introduce into the blower around and in contact with the shaft and its bearings any amount of pure air which may be needed foi-,thc pnr pose of keeping'the shaft and its bearings cool, and also for diluting the heated air or gases'pa'ssing into the blower at some distance. fi'oni the shatt.

Among the purposes for which it is believed `that this blower may be used to convey the volatile products of-combnstion, may be mentioned the rough drying of gi'enn lumber, slaves, &c., peat, bricks, and also vin the manufacture ot' white lead.

Figure 1 of the drawings 7shows, in vertical section taken in a planepassing through theaxis ofthe shatt, a blower embodying niy invention,

Figure 2 being a partial end view of said blower.

'.The blowercase and the faii-wlieel therein are. such as 1 have heretofore shown in United States Letters Patent heretofore granted to nie, and hence -need no special descriptionherein.

'll'lze blower-case has added on each vside a box-like passage-way, a, said passage-ways being connected by the passage b, which has an inlet at o, to which is to be joined -the pipe conveying hot volatile products of .combustion or other heated air or gases to be acted unon hy being drawn into and forced ont f iorn the blower.

The passage-ways a surround and empty into central openings formed in the sides of the blower-case,`

so that the hot current enters the blower in the direction shown by arrows on thedrawnig, tig. 1.

llie pipes d are attached one to each untel-.plate 4of the passage-ways a, said pipes being concentric with tlie'shait e of the blower, the pipes extending inward so-that their delivery-ends (which are preferabl y made Haring or funnel-shaped) appl-'cach each other,

leaving, however, sonic space between them for air to means of bolts which have their heads in a T-shaped` groove tbrined in the sides of the blower-case, as seen at. li, in tig. 1, which device permits vthe whole lof the passage-way for the heated fluid being adjusted at any desired radial-angle or position about the blower-case,

so that the inlet' c may be located as shown, or atany number of degrees from that position. l

The directionsin which common airenters the blot ers are indicated by dotted arrows on the drawing.

rlhe bearings in which shaft e revolyes are located outside ot' the blower and the passage ways a connected therewithand are fixed to tripods which are held to the outer plates` of passage-ways a by bolts having their heads located in a T-slia-ped groove seen at i, tig. 1, which groove is made concentric with shaft c.

When the fan-wheel vis set in motion by action of belts ou the pulleys j, fixed on shaft e, it will be obvious that the heated air or gases will be drawn into the inlet c, and will bifurcate and pass equally through both sides ot' passage-way b into passage-ways a, and thence through the annular openings made between the pipes l and the peripheryv of the central circular openings in the sides ofthe blower-case,.and that the heated air or gases will be expelled from the outlet A li'oinl the blower, the pipes d preventing 'the hot gaseous fluid from coniilig into contact with and troni heating the blower-shaft; by contact, and the bearings the-rect' by conduction.

' It' it is desired to let air enter the blower through `pipes d to cool shaft e, or to dilute the fluid tiowing into the blower from inlet c, the register g is turned more or less to graduate the amount of air to be ad-v uiitted.

A hlower in which heated aeriform ids maybe admitted to t-he aetion of' the tan-wheel through side openings remote from the. shaft, substantially as dcscrihei l Also, in surh 4a hlower, the central opening for admission of' air, with the register or valve for regulating the amount of air admitted, substantially as and for the purpose described.

Also, the passage-ways for the incoming current of heated fluidlronnected with ihe blower sides and with shaft-Supporting tripods, so that the position of said passa ge-ways may be changed as desired without changing the position of the blowenca-se or the relation of the tripods with reference to the belts operating on the pulleys.

B. F. STURTEVANT. Witnesses:

J. B. CRoSBY, O. WARREN BROWN. 

